Naming characters

So, I've heard that in GW2 only ONE person can have a certain name across all servers.
If that's true, I've been wondering about your name and "surnames". Would people be able to name themselves like this;

Sentess
Sentess Somethingmore

So in theory, it's still two different names... yet still the same.
Will it be possible to name characters like that, or will it detect another with the name Sentess in it?